A Duke University professor has stepped down as the head of a master’s program after sending emails warning her students not to speak Chinese in the building.

Megan Neely emailed her first- and second-year students in the Master of Biostatistics Program on Jan. 25, 2019, saying she was approached by two faculty members who complained about international students speaking Chinese on campus lounges and study areas.

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“To international students, PLEASE PLEASE PLEASE keep these unintended consequences in mind when you choose to speak in Chinese in the building,” said Neely’s recent email. “I encourage you to commit to using English 100% of the time when you are in Hock or any other professional setting.”